Back Pointers
In the original single top bidirectional driver example, all driver activity is initiated from the testbench domain.
![](https://res.cloudinary.com/dlzix82l9/image/upload/f_auto/v1689719592/UVM-Cookbook/Testbench-Acceleration-through-Co-Emulation/uvm-cookbook_back-pointers_e1kjiy.jpg)
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